Improvement in sewing-machines



H. w. LITTLE. Improvement in Sewing-Machines. No. 114,573, ParentedMay9,1371.

' [n1/@nier UNITED STATES PATENT OEEIcE.

HALSTED YV. LITTLE, OF MUNOIE, INDIANA, ASSIGNOR TO HIMSELF, AJOHN L.LITTLE, AND I/VILLIAM L. LITTLE, OF SAME PLAGE.

IMPROVEM'ENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 114,573, dated May 9,1871.

I, HALSTED W. LITTLE, of Muncie, in the county of Delaware, State ofIndiana, have invented certain new and useful Improvements inSewing-Machines, of which the following is a speeication:

This invention relates to that class of sewing-machines which makes theGrover 8i Baker stitch; and consists in the attachment and combinationof additional devices to the Grover & Baker machine in such a mannerthat the said machines may also make a shuttlestitch, the object beingto enable the said machine to be readily and easily changed, atpleasure, to make either the Grover &J Baker 'stitch or theshuttle-stitch, as may be desired.

In the drawing, Figure 1 is a longitudinal section of the bed-plate ofthe machine, showing the mode of attaching the shuttle-race and devicefor operating the shuttle in combination with the driving-pulley of themachine. Fig. 2 is a plan view ofthe same. Fig. 3 is a view of thedrivin g-pulley. cranlewheel, and crank-pin detached. Fig. 4 is a sideview of the needle-arm, showing the curved slot and manner'of extendingthe arm. Fig. 5 is a plan view ofthe same, the extension portion beingin section.

A, Figs. l and 2, represents a bed-plate of a sewing-machine, a portion(in section) of which only is shown.

My improvements pertaining to the under side, the works on the upperside are left off in the drawing.

B is the driving wheel or pulley, set in a frame, b, secured to theunder side ofthe bedplate A. In the side of the pulley B is made acam-groove, C.

D is a bar, attached to the bed-plate A by means of two brackets, d d.,which are secured firmly to the bed-plate, the bar D sliding in groovesmade in the brackets for the purpose.

One end of the bar D is connected to the driving-pulley by an arm, D',reaching down to the groove C, and having a pin, c', on it, providedwith a small roller playing in the said cam-groove. By this means areciprocating motion is given to the bar D.

To the bar D is pivoted a lever, E, which is also pivoted to thebed-plate A at e, the other end or said bar E being connected with ashuttlc-bar, F, by a slot and pin, (seen at f, Fig. 2,) the said bar Fplaying in slides g g, secured to the bed-plate A, the bar F beingdriven by the lever E, which derives its motion from the bar D.

G is the shuttle-race, secured to the under side of the bed-plate.

The end of the needle-arm H (seen in de- 4 ta'ched view, Figs. 4 and 5)is provided with an extension, H, which has a slot, 7L, curved upward atthe outer end, the purpose of which is to make a pause in the motion ofthe needlearm, givin g time for the shuttle to pass through the loop ofthe upper thread. The object of making the needle-arm extensible is soas to extend the curved part of the slot beyond the throw of thecrank-pin, which will then have no pause in the movement of theneedle-arm.

The extension part of the arm is secured to the main arm by means of twoslots, j j, a pin, k, and a set-screw, Z.

When the machine is to be employed in making the lock-stitch the bar Dis to be detachedby taking the pin and roller i out of the cam-grooveand extending the arm H,tl1e devices for carrying the shuttle thenremaining idle, the hook for making the Grover & Baker stitch being inplace in the revolving bar N. 4

When the machine is to be employed to make the shuttle-stitch the bar Dis put into gear with the cam C of the pulley B, the arm H shortened,and the hook removed from the bar N.

By the colnbination and arrangement of the above-described devices witha Grover & Ba- "ker sewing-machine it is capable of making either thatstitch or the lock-stitch by making the slight change in the adjustment,as before stated.

Having thus described my invention, I claim- The needle-operating arm H,provided with the adjustable and slotted extension H', as and for thepurpose set forth.

HALSTED YV. LITTLE.

Witn esses:

MARCUS C. SMITH, J oHN T. ROBINSON.

